Anti-falling device for building envelope reconstruction of urban updated building

Abstract

The invention relates to the technical field of civil engineering, in particular to an anti-falling device for an urban updated building reconstruction enclosure structure, which comprises a mounting frame, a grid plate is fixedly connected to the lower side of the interior of the mounting frame, and uniformly distributed disassembly and assembly assemblies are fixedly connected to the upper side of the grid plate and are used for conveniently replacing an air bag. Fixing frames are fixedly connected to the four corners of the exterior of the mounting frame, fixing rings are fixedly connected to the upper sides of the fixing frames, fixing cylinders are fixedly connected to the sides, close to each other, of the fixing rings, fixing rods are rotatably connected to the interiors of the fixing cylinders, and limiting blocks are fixedly connected to the two sides of a fixing disc; and an adjusting screw rod is fixedly connected to the lower side of the fixing disc, the adjusting screw rod is in threaded connection with the interior of the adjusting groove, and a rotating block is fixedly connected to the exterior of the upper side of the fixing rod. The air inflation device has the effects that the mounting frame can be quickly mounted, and the air inflation pressure can be automatically adjusted according to the mounting height.

Description

Technical Field

[0001] This invention relates to the field of civil engineering technology, and in particular to a fall prevention device for the enclosure structure of urban renewal building renovation. Background Technology

[0002] With the deepening of urbanization and the increasing age of buildings, urban renewal and renovation of old buildings has become commonplace. When renovating building envelopes (such as exterior walls, curtain walls, and roofs), the safety of construction workers working at heights is becoming increasingly prominent. Traditional fall prevention measures, such as safety nets, safety ropes, and scaffolding, have revealed many shortcomings in practical application and urgently need improvement.

[0003] Traditional fall arrest systems typically require significant time and manpower for installation and securing, especially on complex or irregular building facades, where the installation process is even more cumbersome. For example, erecting large scaffolding is time-consuming and labor-intensive, and places certain demands on the building structure; while fall arrest systems relying on bolts or welding require destructive operations on the building itself, potentially affecting structural integrity and limiting their rapid deployment on cladding structures of different materials and shapes. This inefficiency and limitation of installation methods, to some extent, hinders the progress of urban renewal and renovation projects and increases construction costs.

[0004] The cushioning effect of some existing fall arrestors often depends on the installation height and specific working conditions when encountering a fall impact. For example, the inflation pressure of inflatable cushioning devices is usually preset and cannot be dynamically adjusted according to the actual installation height and the potential kinetic energy of the fall. This means that their cushioning performance may vary when operating at different heights, failing to provide optimal cushioning at all times, thus affecting the protection of falling personnel. Insufficient cushioning may lead to secondary injuries; excessive cushioning may increase the difficulty of rescue. In addition, some inflatable devices may experience problems such as air leakage and material aging after repeated use or long-term service, affecting their reliability and safety.

[0005] Currently available inflatable fall arrestor airbags have limitations in material selection and structural design. Airbags made of a single material or simple composite materials often cannot simultaneously meet multiple requirements such as high strength, high airtightness, wear resistance, high temperature resistance, and puncture resistance. For example, while pure rubber airbags are flexible, they lack tensile and tear strength and are prone to aging; while pure plastic airbags are lightweight, their airtightness and impact resistance may be poor. This makes airbags prone to damage in harsh construction environments (such as high temperatures, friction, and contact with sharp objects), shortening their service life, requiring frequent maintenance and replacement, increasing operating costs, and posing safety hazards.

[0006] In summary, current fall arrest devices used in urban renewal and building renovation still face numerous unresolved technical challenges regarding ease of installation, environmental adaptability, consistency of cushioning performance, and the overall performance of airbag materials. Therefore, developing a fall arrest device that can be quickly installed, adaptable to different building envelope structures, automatically adjusts inflation pressure based on installation height to ensure consistent cushioning performance, and utilizes high-strength composite materials to extend its service life is of significant practical importance for improving construction safety and protecting the health and lives of personnel. Summary of the Invention

[0007] The purpose of this application is to provide a fall protection device for the building envelope of urban renewal and renovation, which aims to improve the problems of insufficient buffering performance, high transportation costs and difficult maintenance in the existing technology.

[0008] This application provides a fall protection device for the enclosure structure of an urban renewal building renovation project, comprising an installation frame. A grid plate is fixedly connected to the lower inner side of the installation frame. Disassembly and assembly components are fixedly connected to the upper side of the grid plate, facilitating airbag replacement. Fixing frames are fixedly connected to the four outer corners of the installation frame. A fixing ring is fixedly connected to the upper side of each fixing frame. A fixing cylinder is fixedly connected to the side of the fixing ring closest to it. A fixing rod is rotatably connected inside the fixing cylinder. A rotating block is fixedly connected to the upper outer side of the fixing rod. A fixing plate is fixedly connected to the bottom end of the fixing rod. Limiting blocks are fixedly connected to both sides of the fixing plate. An adjusting screw is fixedly connected to the lower side of the fixing plate. The adjusting screw is threaded into the interior of an adjusting groove, which is located on the upper side of a connecting sleeve. The connecting sleeve is fixedly connected to the side of a pressure plate closest to it.

[0009] Preferably, the assembly / disassembly assembly includes a female hook and loop fastener, which is fixedly connected to the upper side of the mesh plate. A male hook and loop fastener is adhesively connected to the upper side of the female hook and loop fastener, and the male hook and loop fastener is fixedly connected to the lower two sides of the airbag. The airbag is disposed inside the mounting frame, and a pressure sensing valve is fixedly connected to the side of the airbag that is furthest away from it.

[0010] Preferably, a connecting pipe is fixedly connected to the side of the airbag furthest away from the airbag. A connecting groove is formed inside the connecting pipe. Sliding grooves are formed on both sides of the connecting groove. A transition groove is formed on the side of the sliding groove furthest from the airbag. A through groove is formed on the side of the transition groove furthest from the airbag. A connecting ring is slidably connected inside the connecting groove. Connecting components are fixedly connected to both sides of the outer side of the connecting ring. The connecting components are used to facilitate the installation of the air supply pipe. An air supply pipe is fixedly connected to the front side of the connecting components. The air supply pipe is fixedly connected to the output end of the air pump.

[0011] Preferably, the connecting assembly includes a plug block, which is fixedly connected to both sides of the connecting ring. A groove is provided on the opposite side of the plug block. A connecting shaft is fixedly connected inside the groove. A rotating sleeve is rotatably connected to the outside of the connecting shaft. A retaining plate is fixedly connected to the opposite side of the rotating sleeve. Springs are fixedly connected to both sides inside the groove. The other end of the spring is fixedly connected to the adjacent side of the retaining plate.

[0012] Preferably, the airbag has a first rubber coating layer fixedly connected inside, a first polymer plastic coating layer fixedly connected outside the first rubber coating layer, and a reinforcing component fixedly connected outside the first polymer plastic coating layer, the reinforcing component being used to improve the strength of the airbag.

[0013] Preferably, the reinforcing component includes a fiber mesh base fabric layer, the fiber mesh base fabric layer is fixedly connected to the outside of the first polymer plastic coating, a second polymer plastic coating is fixedly connected to the outside of the fiber mesh base fabric layer, and a second rubber coating layer is fixedly connected to the outside of the second polymer plastic coating.

[0014] Preferably, the plug block is slidably connected inside the slide groove and the adapter groove, and the card plate is slidably connected inside the through groove and the recess.

[0015] Preferably, a limiting frame is fixedly connected inside the fixed cylinder, and the limiting block is slidably connected inside the limiting frame.

[0016] Preferably, the pressure plate is slidably connected to the opposite side of the fixed ring.

[0017] Preferably, the first polymer plastic coating, the fiber mesh base fabric layer, the second polymer plastic coating, and the second rubber coating layer are all fixedly connected inside the airbag.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. This application uses manual rotation of the rotating block to drive the fixed rod to rotate, which in turn drives the fixed plate and the adjusting screw to rotate. The adjusting screw rotates inside the adjusting groove, which in turn drives the connecting sleeve to move. The movement of the connecting sleeve drives the pressure plate to move. Through the principle of negative pressure, it can quickly attach to various building surfaces, thus enabling rapid installation of the mounting frame, shortening the installation time, and adapting to different building envelope structures. 2. In this application, the air supply pipe is manually moved to insert the connecting ring into the connecting groove. At the same time, the moving connecting ring causes the insertion block to insert into the sliding groove. Then, the connecting ring is rotated in the opposite direction to slide inside the connecting groove. At the same time, the moving connecting ring causes the insertion block to slide inside the transition groove. When it slides to the bottom of the transition groove, the spring generates elastic force to insert the locking plate into the through groove. Then, the air pump is started to deliver gas to the air supply pipe, connecting pipe, and airbag to inflate them. After inflation, the locking plate is manually pushed out of the through groove. At the same time, the locking plate slides inside the groove to compress the spring. Then, the connecting ring is manually rotated to slide the insertion block to the bottom of the transition groove. Then, the connecting ring is manually pulled out of the connecting groove. At the same time, the moving connecting ring causes the insertion block to disengage from the sliding groove. The above steps are repeated to gradually inflate the airbag. This enables the device to automatically adjust the inflation pressure according to the installation height to ensure consistent cushioning performance. 3. The first and second rubber coating layers of this application have excellent flexibility and deformation capabilities, which can effectively fill tiny gaps and prevent gas leakage. The first and second polymer plastic coating layers have good gas barrier properties, which can further reduce the air permeability of the airbag. The fiber mesh base fabric layer is the main load-bearing layer that bears the internal pressure, giving the airbag excellent tensile strength, tear strength and dimensional stability. This enables the airbag to be resistant to high temperature, wear and sharp objects, effectively extending the service life of the airbag and reducing maintenance and replacement costs. Attached Figure Description

[0019] Figure 1 This is a perspective view of a fall prevention device for the building envelope of an urban renewal building renovation project, according to an embodiment of this application. Figure 2 This is a schematic diagram of the disassembled structure of a fall prevention device for the building envelope of an urban renewal building renovation project, according to an embodiment of this application. Figure 3 This is a schematic diagram of the adsorption component structure of an anti-fall device for the building envelope structure in urban renewal and renovation according to an embodiment of this application; Figure 4 This is a schematic diagram of the airbag structure of an anti-fall device for the building envelope of an urban renewal building renovation project, according to an embodiment of this application. Figure 5 This is a cross-sectional view of the connecting pipe of a fall arrest device for an urban renewal building envelope structure according to an embodiment of this application; Figure 6 This is a partial structural schematic diagram of a fall prevention device for the building envelope of an urban renewal building renovation project according to an embodiment of this application; Figure 7 This is a cross-sectional view of the plug-in block of an anti-fall device for the building envelope structure in urban renewal and renovation according to an embodiment of this application; Figure 8This is a schematic diagram of the internal structure of the airbag of an anti-fall device for the building envelope of an urban renewal building renovation project, according to an embodiment of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Mounting frame; 2. Mesh plate; 3. Female Velcro; 4. Female Velcro; 5. Airbag; 6. Pressure sensing valve; 7. Fixing bracket; 8. Fixing ring; 9. Fixing cylinder; 10. Fixing rod; 11. Rotating block; 12. Fixing disc; 13. Limiting block; 14. Limiting frame; 15. Adjusting screw; 16. Adjusting groove; 17. Connecting sleeve; 18. Pressure plate; 19. Connecting pipe; 20. Connecting groove; 21. Slide groove; 22. Adapter groove; 23. Through groove; 24. Connecting ring; 25. Insertion block; 26. Groove; 27. Connecting shaft; 28. Rotating sleeve; 29. ​​Clamping plate; 30. Spring; 31. Air supply pipe; 32. Air pump; 33. First rubber coating layer; 34. First polymer plastic coating; 35. Fiber mesh base fabric layer; 36. Second polymer plastic coating; 37. Second rubber coating layer. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 -Appendix Figure 8 This application will be described in further detail below.

[0022] Example: Reference Figures 1-4 A fall arrestor for the enclosure structure of an urban renewal building renovation project includes a mounting frame 1. A grid plate 2 is fixedly connected to the lower inner side of the mounting frame 1. Disassembly and assembly components are fixedly connected to the upper side of the grid plate 2, facilitating the replacement of airbags 5. Fixing brackets 7 are fixedly connected to the four outer corners of the mounting frame 1. Fixing rings 8 are fixedly connected to the upper side of the fixing brackets 7. Fixing cylinders 9 are fixedly connected to the adjacent sides of the fixing rings 8. Fixing rods 10 are rotatably connected inside the fixing cylinders 9. Rotating blocks 11 are fixedly connected to the upper outer side of the fixing rods 10. A fixing plate 12 is fixedly connected to the bottom end of the fixing rods 10. Limiting blocks 13 are fixedly connected to both sides of the fixed plate 12. An adjusting screw 15 is fixedly connected to the lower side of the fixed plate 12. The adjusting screw 15 is threaded into the inside of the adjusting groove 16. The adjusting groove 16 is located on the upper side of the connecting sleeve 17. The connecting sleeve 17 is fixedly connected to the side of the pressure plate 18 that is close to it. The disassembly and assembly components include a female hook and loop fastener 3. The female hook and loop fastener 3 is fixedly connected to the upper side of the mesh plate 2. A male hook and loop fastener 4 is adhesively connected to the upper side of the female hook and loop fastener 3. The male hook and loop fastener 4 is fixedly connected to the lower two sides of the airbag 5. The airbag 5 is located inside the mounting frame 1. A pressure sensing valve 6 is fixedly connected to the side of the airbag 5 that is far away from it.

[0023] When using this device, the grid plate 2 serves as a supporting frame, effectively ensuring the overall stability of the system. When replacing the airbag 5, manually moving the airbag 5 causes the sub-hook / loop fastener 4 to move, detaching it from the mother hook / loop fastener 3. Simultaneously, the airbag 5 detaches from the mounting frame 1, allowing for independent replacement of a single damaged airbag 5 without requiring overall disassembly, thus reducing maintenance costs. Manually rotating the rotating block 11 causes the fixing rod 10 to rotate, which in turn rotates the fixing disc 12, which in turn rotates the adjusting screw 15. The rod 15 rotates inside the adjusting groove 16, while the fixed plate 12 rotates, causing the limiting block 13 to slide inside the limiting frame 14, which in turn causes the connecting sleeve 17 to move. The movement of the connecting sleeve 17 causes the pressure plate 18 to move, and it quickly attaches to various building surfaces (such as curtain walls, concrete walls, etc.) through the principle of negative pressure. No pre-embedded anchors are required, and the installation time is shortened. This enables the rapid installation of the mounting frame 1, shortens the installation time, and adapts to different building envelope structures. When subjected to falling impact, the pressure sensing valve 6 releases compressed gas in stages according to the magnitude of the impact force, absorbing energy step by step and avoiding the failure of a single buffer layer due to overload.

[0024] Reference Figures 1-7 A connecting pipe 19 is fixedly connected to the side of the airbag 5 away from the airbag. A connecting groove 20 is provided inside the connecting pipe 19. Sliding grooves 21 are provided on both sides of the connecting groove 20. An adapter groove 22 is provided on the side of the sliding groove 21 away from the airbag. A through groove 23 is provided on the side of the adapter groove 22 away from the airbag. A connecting ring 24 is slidably connected inside the connecting groove 20. Connecting components are fixedly connected to both sides of the connecting ring 24. The connecting components facilitate the installation of the air supply pipe 31. The air supply pipe 31 is fixedly connected to the front of the connecting components. The air tube 31 is fixedly connected to the output end of the air pump 32; the connecting assembly includes a plug block 25, which is fixedly connected to both sides of the connecting ring 24. A groove 26 is provided on the opposite side of the plug block 25. A connecting shaft 27 is fixedly connected inside the groove 26. A rotating sleeve 28 is rotatably connected to the outside of the connecting shaft 27. A retaining plate 29 is fixedly connected to the opposite side of the rotating sleeve 28. Springs 30 are fixedly connected to both sides inside the groove 26. The other end of the spring 30 is fixedly connected to the side of the retaining plate 29 closest to it.

[0025] When using this device, when inflating the airbag 5, manually move the air supply pipe 31. The movement of the air supply pipe 31 moves the connecting ring 24, inserting it into the connecting groove 20. Simultaneously, the movement of the connecting ring 24 moves the insertion block 25, inserting it into the sliding groove 21. Then, rotate the connecting ring 24 in reverse, causing it to slide within the connecting groove 20. This movement again moves the insertion block 25, causing it to slide within the transition groove 22. When the block reaches the bottom of the transition groove 22, the spring 30 generates elastic force, moving the locking plate 29. The clamping plate 29 is inserted into the through slot 23. At the same time, the movement of the clamping plate 29 causes the rotating sleeve 28 to rotate outside the connecting shaft 27. Then, the air pump 32 is started, which drives the gas to be delivered into the air supply pipe 31. The gas enters the connecting pipe 19 from the air supply pipe 31, and then enters the airbag 5 from the connecting pipe 19 to inflate it. After inflation, the clamping plate 29 is manually pushed to disengage it from the through slot 23. At the same time, the clamping plate 29 slides in the groove 26, compressing the spring 30. Then, the connecting ring 24 is manually rotated. The rotation of the connecting ring 24 causes the insertion block 25 to slide in the transition groove 22. When it moves to the bottom of the transition groove 22, the connecting ring 24 is manually pulled to disengage it from the connecting groove 20. At the same time, the movement of the connecting ring 24 causes the insertion block 25 to disengage from the sliding groove 21. The above steps are repeated to gradually inflate the airbag 5, so that the device can automatically adjust the inflation pressure according to the installation height to ensure consistent cushioning performance.

[0026] Reference Figure 1 , Figure 4 , Figure 8 The airbag 5 has a first rubber coating layer 33 fixedly connected inside, a first polymer plastic coating layer 34 fixedly connected outside the first rubber coating layer 33, and a reinforcing component fixedly connected outside the first polymer plastic coating layer 34. The reinforcing component is used to improve the strength of the airbag 5. The reinforcing component includes a fiber mesh base fabric layer 35, which is fixedly connected outside the first polymer plastic coating layer 34. A second polymer plastic coating layer 36 is fixedly connected outside the fiber mesh base fabric layer 35, and a second rubber coating layer 37 is fixedly connected outside the second polymer plastic coating layer 36.

[0027] When using this device, the first rubber coating layer 33 and the second rubber coating layer 37 have excellent flexibility and deformation ability, which can effectively fill tiny gaps, provide excellent airtightness, prevent gas leakage, and ensure the stability and service life of the airbag 5. The first polymer plastic coating layer 34 and the second polymer plastic coating layer 36 have good gas barrier properties, which can further reduce the air permeability of the airbag 5 and enhance the gas retention capacity. The fiber mesh base fabric layer 35 is the main load-bearing layer that bears the internal pressure, giving the airbag 5 excellent tensile strength, tear strength and dimensional stability, preventing the airbag 5 from over-expanding or deforming under pressure, and achieving the effect of high temperature resistance, wear resistance and resistance to sharp objects, effectively extending the service life of the airbag 5 and reducing maintenance and replacement costs.

[0028] Reference Figure 3 , Figure 5 , Figure 8 The plug-in block 25 is slidably connected inside the slide groove 21 and the adapter groove 22, and the card plate 29 is slidably connected inside the through groove 23 and the groove 26; the fixed cylinder 9 is fixedly connected to the limit frame 14, and the limit block 13 is slidably connected inside the limit frame 14; the pressure plate 18 is slidably connected to the opposite side of the fixed ring 8; the first polymer plastic coating 34, the fiber mesh base fabric layer 35, the second polymer plastic coating 36, and the second rubber coating layer 37 are all fixedly connected inside the airbag 5.

[0029] When using this device, the plug-in block 25 is slidably connected inside the slide groove 21 and the transition groove 22, and the clamping plate 29 is slidably connected inside the through groove 23 and the recess 26, which serves to support and limit the plug-in block 25 and the clamping plate 29; the limiting frame 14 is fixedly connected inside the fixed cylinder 9, and the limiting block 13 is slidably connected inside the limiting frame 14, which serves to support and limit the fixed plate 12; the pressure plate 18 is slidably connected to the opposite side of the fixed ring 8, which serves to enable the pressure plate 18 to quickly adhere to various building surfaces; the first polymer plastic coating 34, the fiber mesh base fabric layer 35, the second polymer plastic coating 36, and the second rubber coating layer 37 are all fixedly connected inside the airbag 5, which effectively improves the service life of the airbag 5.

[0030] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fall protection device for the building envelope of an urban renewal building renovation project, comprising a mounting frame (1), characterized in that, A mesh plate (2) is fixedly connected to the lower inner side of the mounting frame (1). A uniformly distributed disassembly and assembly assembly is fixedly connected to the upper side of the mesh plate (2). The disassembly and assembly assembly assembly is used to facilitate the replacement of the airbag (5). A fixing bracket (7) is fixedly connected to each of the four outer corners of the mounting frame (1). A fixing ring (8) is fixedly connected to the upper side of the fixing bracket (7). A fixing cylinder (9) is fixedly connected to the side of the fixing ring (8) that is close to it. A fixing rod (10) is rotatably connected inside the fixing cylinder (9). A rotating block (11) is fixedly connected to the upper external side of the fixed rod (10). A fixed plate (12) is fixedly connected to the bottom end of the fixed rod (10). Limiting blocks (13) are fixedly connected to both sides of the fixed plate (12). An adjusting screw (15) is fixedly connected to the lower side of the fixed plate (12). The adjusting screw (15) is threadedly connected to the inside of the adjusting groove (16). The adjusting groove (16) is located on the upper side of the connecting sleeve (17). The connecting sleeve (17) is fixedly connected to the side of the pressing plate (18) that is close to it.

2. The anti-fall device for the building envelope of urban renewal and renovation according to claim 1, characterized in that, The assembly and disassembly assembly includes a female hook and loop fastener (3), which is fixedly connected to the upper side of the mesh plate (2). A female hook and loop fastener (4) is adhesively connected to the upper side of the female hook and loop fastener (3). The female hook and loop fastener (4) is fixedly connected to the lower two sides of the airbag (5). The airbag (5) is located inside the mounting frame (1). A pressure sensing valve (6) is fixedly connected to the side of the airbag (5) that is furthest away from it.

3. The anti-fall device for the building envelope of urban renewal and renovation according to claim 2, characterized in that, A connecting pipe (19) is fixedly connected to the side of the airbag (5) away from each other. A connecting groove (20) is provided inside the connecting pipe (19). A sliding groove (21) is provided on both sides of the connecting groove (20). A transition groove (22) is provided on the side of the sliding groove (21) away from each other. A through groove (23) is provided on the side of the transition groove (22) away from each other. A connecting ring (24) is slidably connected inside the connecting groove (20). A connecting component is fixedly connected to both sides of the outer side of the connecting ring (24). The connecting component is used to facilitate the installation of the air supply pipe (31). The air supply pipe (31) is fixedly connected to the front side of the connecting component. The air supply pipe (31) is fixedly connected to the output end of the air pump (32).

4. A fall protection device for the building envelope of an urban renewal building renovation project according to claim 3, characterized in that, The connecting assembly includes a plug block (25), which is fixedly connected to both sides of the connecting ring (24). A groove (26) is provided on the opposite side of the plug block (25). A connecting shaft (27) is fixedly connected inside the groove (26). A rotating sleeve (28) is rotatably connected to the outside of the connecting shaft (27). A retaining plate (29) is fixedly connected to the opposite side of the rotating sleeve (28). Springs (30) are fixedly connected to both sides inside the groove (26). The other end of the springs (30) is fixedly connected to the side of the retaining plate (29) that is close to it.

5. A fall protection device for the building envelope of an urban renewal building renovation project according to claim 2, characterized in that, The airbag (5) is internally fixedly connected to a first rubber coating layer (33), and externally fixedly connected to a first polymer plastic coating layer (34). Externally fixedly connected to the first polymer plastic coating layer (34) is a reinforcing component, which is used to improve the strength of the airbag (5).

6. A fall arrestor for an urban renewal building envelope as described in claim 5, characterized in that, The reinforcing component includes a fiber mesh base fabric layer (35), which is fixedly connected to the outside of a first polymer plastic coating (34). A second polymer plastic coating (36) is fixedly connected to the outside of the fiber mesh base fabric layer (35), and a second rubber coating layer (37) is fixedly connected to the outside of the second polymer plastic coating (36).

7. A fall protection device for the building envelope of an urban renewal building renovation project according to claim 4, characterized in that, The plug block (25) is slidably connected inside the slide groove (21) and the adapter groove (22), and the card plate (29) is slidably connected inside the through groove (23) and the recess (26).

8. A fall protection device for the building envelope of an urban renewal building renovation project according to claim 1, characterized in that, The fixed cylinder (9) is fixedly connected to the inner limit frame (14), and the limit block (13) is slidably connected inside the limit frame (14).

9. A fall arrestor for an urban renewal building envelope as described in claim 1, characterized in that, The pressure plate (18) is slidably connected to the opposite side of the fixed ring (8).

10. A fall protection device for the building envelope of an urban renewal building renovation project according to claim 6, characterized in that, The first polymer plastic coating (34), the fiber mesh base fabric layer (35), the second polymer plastic coating (36), and the second rubber coating layer (37) are all fixedly connected to the inside of the airbag (5).

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